A disused name for the element now called promethium, n.
| 单词 | θ68774 |
| 释义 | the world > matter > chemistry > elements and compounds > metals > specific elements > promethium > [noun] (3) illinium1926 A disused name for the element now called promethium, n. florentium1927 A disused name for the element promethium, n. promethium1948 A rare, radioactive, metallic chemical element of the lanthanide series, atomic number 61, which was first produced artificially in a nuclear… |
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